Jasmine was also a nibbler when she was younger, and sometimes those bites hurt with those sharp little teeth. I would tell her "no bite" and give her a chew toy and if she did it again, I put her in her crate for a time out-only about 5 min. or so. Then, I would take her out, and if she nipped again, back in the crate she went. It took a while, but she finally realized that biting was not acceptable behaviour. I think all puppies like to bite and chew, some more than others. Now, I am having problems with her nipping at my ankles and feet when I am walking around the house. Someone on this forum suggested using a squirt gun, and I finally remembered to buy one at Walmart yesterday and I'll try this method.